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linear fit of simulation results

olalivier
In ADE I extract some parameters from a waveform (time elapsed from rising to falling edge on some kind of TOT) on a parametric simulation. I plot the result but I would like to get a linear fit of this curve plus residuals. I can't find a way to do that with in the calc. Can you please tell me if that fonction exists. Thank you very much Olivier
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  • Andrew Beckett

    There's nothing built-in currently, although it wouldn't be too hard to write a function that performed linear regression on the points in the curve and produced a best-fit line using a least-squares method. You could then subtract this from the original curve to get the residuals. I'd write it myself but don't really have time right now to knock something together.

    There is an existing enhancement CCR, 57477, which is for doing a polynomial fit in the calculator, but that's not been implemented yet (it's a long-standing low-priority enhancement request with only 2 requests over 13 years, so not that likely to get implemented any time soon).

    Regards,

    Andrew.

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  • Andrew Beckett

    There's nothing built-in currently, although it wouldn't be too hard to write a function that performed linear regression on the points in the curve and produced a best-fit line using a least-squares method. You could then subtract this from the original curve to get the residuals. I'd write it myself but don't really have time right now to knock something together.

    There is an existing enhancement CCR, 57477, which is for doing a polynomial fit in the calculator, but that's not been implemented yet (it's a long-standing low-priority enhancement request with only 2 requests over 13 years, so not that likely to get implemented any time soon).

    Regards,

    Andrew.

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